Sharpening device



G. B. LINDSAY SHARPENING DEVICE Filed July 1921 2 Sheets-Sheet 1 Jan,1', 1924 1,479,190 I G. B. LINDSAY SHARPENING DEVICE z I v v i F764. 5m... 4. A

u 4 a mam may 6 mun 1 Patented Jan. 1, 1224.

uarraa stares tie earner oaaic GEORGE BENJAMIN LINDSAY, or KoKoMo,INDIANA.

SHARPENING- DEVICE.

Application filed July a, 1921.- Serial No. 483,440.

ful Improvements in Sharpening Devices, of

which the following isa specificatiom'the principle of the inventionbeing herein explained and the best mode in which I have contemplatedapplying that principle, so as to distinguish it from other inventions.

My invention relates to sharpening devices adapted to sharpening diskharrow blades or the like. The object of the invention is to provide adevice of the above described character which may be mounted upon aharrow and so arranged as to exercise its sharpening function during theordinary operation of the harrow.

The said invention consists of means hereinafter fully described andparticularly set forth in the claims.

More specifically, the invention comprises a suitable sharpener framewhich carries an abrading member, together with an auxil iary frame-barwhich may be detachably secured to the harrow frame adjacent to thedisk, the arrangement being such as will permit the sharpening device tobe secured at various positions along said bar, whereby its sharpeningfunction may be directed to any one of the disks which may require suchsharpening. Y

.The annexed drawings and the following description set forth in detailcertain means embodying my invention, the disclosed means, however,constituting but one of the various mechanical forms in which theprinciple of the invention may be applied.

In said annexed drawings:

Figure 1 represents a plan of a disk harrow to which my invention hasbeen applied;

Fig. 2 represents, upon an enlarged scale, a front elevation of thesharpening device;

Fig. 3 represents, upon such enlarged scale, a side elevation of saiddevice, a part of one jaw being broken away to disclose an abradingmember and its mounting;

Fig. 4 represents a section taken upon the plane indicated by the lineIV-IV, Fig. 3;

Fig. 5 represents a section taken upon the plane indicated by line V-V,Fig. 3; and

Fig. 6 represents a detail section taken upon the plane indicated by theline VIVI,

5 Fig. 4.

tion includes a frame-bar 1, Fig. 1, which is detachably securable bymeans of suitable bolts 2 to any one of the cross-members 3 forming partof the auxiliary harrow frame upon which'the disks are directly mounted.

Thisbar when secured in place as shown, extends backwardly and parallelwith the disk axis, and is provided with a multiplicity of holes 4, twoof theseholes being located above and adjacent to the rear por' tion ofthe peripherv in each disk. These holes are adapted to receive the upperends of two angle rods 5-5, Figs. 2 and 8. The upper ends of thevertical members of rods 5-5 are threaded and provided with the jam-nuts66. These upper ends are securable to bar 1 by means of thumb-nuts 7co-operating with the jam-nuts 6.

The ends of the horizontal members of rods 55 are flattened as at 8,Figs. 3 and 4,

and are bolted to opposite sides of a block 9 through which extendsvertically a pivot pin 10. This pin forms a journal for two jaws 11 and12. The horizontal arms of the rod 5 extend as shown in Fig. 1,backwardly {and perpendicularly to the frame bar 1.

Intermediate of their ends and in these jaws are formed two aperturesthrough which extends abolt 13, whose ends are threaded and providedwith nuts 14 -14. Intermediately of these nuts and around the bolt, areinterposed two coiled springs 1515 whose inner ends bear against theouter surface of the jaws and whose outer end surfaces bear against thenuts 14. These nuts may therefore be adjusted so as to cause the coilsprings to actuate the outer or free ends of the jaws toward each other.The outer or free end of jaw 11 is formed with a bifurcated boss 16 inthe open space of which is mounted a carrier 17 for the cutting member18 consisting preferably of an ordinary file of a character suitable forcutting the periphery of a harrow disk. This carrier 17 is pivotallysecured in this boss by means of pivotal screw-pins 1919, as shown inFigs. 3 and 4, and consists of a block provided with a rectangular way20 into which the cutting member or file 18 may be inserted, itsposition in this way being secured by means of a set screw 21, shown indotted lines in Fig. 4.

The jaw 11 is furthermore provided with a laterally extending boss 22 inwhich is mounted an oscillatory pin 23, Figure 6. This pin is providedwith a threaded openlit) ing '24 which is engaged by a screw 25 hav-.

ing its outer end provided withja thumb piece 26 and also passingthrough a laterally enlarged opening 27 formed in the boss. It will benoted that the screw may, as a result of the above described structure,have,

a limited amount of oscillation imparted to it. The inner end of this?screw articulates with a boss 28 formed upon the block 17, beinglongitudinally. secured therein. by means of a pin 29 engaging-a groove30 formed in the engaging end of saidscrew,

. also as clearly shown in Fig. 6;

By turning the screw25, it Willbe seen that the block 17 and hence theeutti-ng mem-v ber 18 may be'adjusted upon their common.

axis of oscillation.

The outer or free end of the other-jaw 12 is 'also provided with abifurcated boss- 31 in which is mounted an anti-friction roller 82having an axis at right angles with the axis of oscillation of theblock- 17.

The above described device is secured in the desired position upon thehaul, the nuts 14 having first been turned so as to permit;-

the jaws 11 and 12 to become separatedso. as to allow their outer endsto enclose the ads jacent harrovv disk. The nuts lt'now being turned soas to compress the springs 15...1 5,v

the jaws, close until the anti-friction roller 32 comes into contactwith the concave side of the disk and the cutting member 18 intocontact. "with that portion of the disks pe riphery which it is desiredto. cut and so effect the required sharpening, The screwv 25 is turnedso as to im part tov thecuttin member the desired angular;positi on a1las will be readily understoodby those skilled in the art. 7

In addition, to the above deseribedparts, I have alsogprovided aresilient, member 33 which is. secured to that side of the. block 9adjacent tothe jaw 11, by means of suitable screws 34, Fig. 2, and whoseouter end portion is adaptedto lie; against the convex side of the disk,as shown in Fig. 4, and act' the combination of a suitable frame-membertwo' relatively movable jaws mounted uponthe latter; can abradingmemberpivotally. mountedupon one of said jaws;

means tending to close-the latter; and means foradjusting: said abradingmember upon spiwt -l. s-

A disk-sharpening device comprising the combination of a suitableframe-member,;two jawspivotally mounted upon the latte 1 an abrad'i -ngmember pivotally mounted upon one of said jaws, an antifriction; roller.mounted upon the other of said-,,j;a ws, means tending to close thelatter, and means for adjusting said abrading n'ieinber upon its pivotalaxis.

3. A disk sharpening device comprising thecombinati n of a suitablesupport a bloclrsecured to said'supportk; two jaws pivotally mountedupon the same block; a cutting member oscillatorily mounted in the freeendoifone of said jaws soas to permit;;,it to bemovedtoward and from theother jaw end a pivotally mounted adjusting screw carried by the jawupon which said cutting member is. mounted, and havg" ne and nssa eg't lte d a s tendingtoqclose said two. jaws. H Signed byme this28 day ofJune, 1921.

eEoneE BnNJa-MINfLiNDsi-ir;

